UFCThe Ultimate Fighting Championship (UFC) is a U.S.-based mixed martial arts organization, recognized as the largest MMA promotion in the world. The UFC is headquartered in Las Vegas, Nevada and is owned and operated by Zuffa, LLC. This promotion is responsible for solidifying the sport's postion in the history-books.
UFC is currently undergoing a remarkable surge in popularity, along with greater mainstream media coverage. UFC programming can now be seen on FOX, FX, and FUEL TV in the United States, as well as in 35 other countries worldwide.

The fighters that reach the limit of 265 pounds are the hardest to knockout due to their weight, so which knockouts of big men were the favorites?

Todd Duffee being knocked out by a punch from Mike Russow and Alistair Overeem
Mike Russow getting Tko'd by Werdum (possibly the only big man yet to be knocked out)
Mark Hunt knocked out by Manhoef
Rothwell, Tim Sylvia and Nelson being knocked out by Arlovski
Antonio Silva getting knocked out by Cormier (but also knocked down by Mike Kyle)

Any other big men 260lbs that got knocked out and fought in the UFC? I dont recall Lesnar being knocked down for example except the kick to the liver by Overeem. If I remember Carwin was knocked down by JDS